docs: def get_valid_commands():
      """
      Returns valid commands.
  
      Returns:
          commands (list): List of valid commands
      """
      modules = [m.basename().split('.')[0] for m in Path(__file__).dirname().files('*.py')]
      commands = []
      for modname in modules:
          if modname == 'main':
              continue
          mod = importlib.import_module('i18n.%s' % modname)
          if hasattr(mod, 'main'):
              commands.append(modname)
      return commands